New to OPK tests HELP😩😩😩

Can someone give me some insight. I am supposed to ovulate on Friday 5/15. My period was very short and fairly light only 3 days long. This past Sunday on 5/10 I had cramping which always felt like my ovulation cramps I experience from time to time. Could I have ovulated extremely early like right after my period? My lines keep getting fainter and fainter. I’m new to OPK tests is this normal? Will I get a surge like tomorrow?